Sylvia looked at the compass with a new interest; she was sure that navigation would be a much more interesting study than grammar, and resolved to ask her father to teach her how to "box the compass."
There had been many changes at Fort Moultrie since Sylvia's last visit. A deep ditch had been dug between the fort and the sand-bars, and many workmen were busy in strengthening the defences, and Sylvia and Grace wondered why so many soldiers were stationed along the parapet.
Captain Carleton seemed very glad to welcome them, and sent a soldier to escort the girls to the officers' quarters, while Mr. Fulton went in search of Major Anderson. Sylvia wondered if she would have a chance to tell Mrs. Carleton that she had safely delivered the message.
Mrs. Carleton was in her pleasant sitting-room and declared that she had been wishing for company, and held up some strips of red and white bunting. "I am making a new flag for Fort Sumter," she said. "Perhaps you will help me sew on the stars, one for each State, you know."
"Is there one for South Carolina?" asked Grace, as Mrs. Carleton found two small thimbles, which she said she had used when she was no older than Sylvia, and showed the girls how to sew the white stars securely on the blue.
"Yes, indeed! One of the first stars on the flag was for South Carolina," replied Mrs. Carleton, "and this very fort was named for a defender of America's rights."
While Grace and Sylvia were so pleasantly occupied Estralla had wandered out, crossed the bridge which connected the officers' quarters with the fort, and now found herself near the landing-place, so that when Mrs. Carleton made the girls a cup of hot chocolate and looked about to give Estralla her share, the little colored girl was not to be seen.
"I'll call her," said Sylvia, and ran out on the veranda.
No response came to her calls, so she went down the steps and along the walk which led to the sand-bars, past the houses and barracks on Sullivan's island. No one was in sight whom she could ask if Estralla had passed that way. She climbed a small sand-hill covered with stunted little trees and looked about, but could see no trace of the little darky. It had not occurred to Sylvia that Estralla would go back to the fort.
"Oh, dear! I wonder where she can be," thought Sylvia, calling "Estralla! Estralla!" and sure that if she was within hearing Estralla would instantly appear. As Sylvia climbed over the sandy slope she saw here and there a small green vine with glossy leaves and a tiny yellow blossom, and resolved to gather a bunch to carry back to Mrs. Carleton. "When I give them to her I'll have a chance to say that Mr. Doane has the letter," she thought.